IS 5517:1993 50Cr4V2 Steel: Specifications & Listings
IS 5517:1993 50Cr4V2: 50Cr4V2 is a steel in IS 5517:1993 (Steels for Hardening and Tempering), intended in general for forgings and machined parts for engineering or automobile purposes.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Si
Mn
Cr
V
S
P
0.45-0.55
0.15-0.40
0.70-1.10
0.90-1.20
0.10-0.20
<=0.035
<=0.035
Mechanical Properties
Tensile Strength
780-980 MPa
Yield Strength (0.2% proof)
590 MPa min
Elongation
>=13%
Izod Impact
34 J min
Hardness (annealed)
<=250 HB
Condition
Hardened and tempered, ruling section up to 250 mm
More data from IS 5517:1993
From the standard
Heat treatment temperatures5 values
Hot working temperature
1050 to 850 °C
Normalising temperature
840 to 880 °C
Hardening temperature
830 to 860 °C
Quenching medium
Oil
Tempering temperature
540 to 680 °C
Source: IS 5517:1993 with Amendments 1 to 3, Table 4
Properties after hardening and tempering, by ruling section4 sections
Tensile strength (MPa)
0.2% proof stress, min (MPa)
Elongation, min (%)
Izod impact, min (J)
Limiting ruling section (mm)
780 to 980
590
13
34
250
900 to 1080
690
12
34
100
980 to 1180
780
10
34
40
1080 to 1270
880
9
34
16
Values apply to test bars taken from rounds along the direction of rolling. Izod impact values are for fine grained steels.
Source: IS 5517:1993 with Amendments 1 to 3, Table 5
Hardness by delivery condition2 conditions
As annealed (A), maximum
250 HB
As rolled (R), maximum
As per agreement
Source: IS 5517:1993 with Amendments 1 to 3, Table 6
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